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Philipp
(@philipp-8)
Active Member
Difference between profiles

Hey everybody, I am wondering what the difference between the "Speed" and "Structural" settings are. I can see that structural takes longer, but why? What's the advantage of it. I guess I could click through all the menues and check which settings are different, but I am not that well versed in all the settings that I'd easily understand the differences. Can someone explain it to me in simple words, please? 😀

Posted : 04/08/2023 7:50 am
Diem
 Diem
(@diem)
Illustrious Member

As a rule of thumb:  Fast printing makes weak parts, ok for trinkets perhaps but not for anything structural.

Functional or structural parts must be printed slowly enough that the layers have time to weld together well.  Even then it pays to consider the direction of print head travel as prints tend to be stronger across the lay and weaker between the layers.

Anyone fretting about faster and faster printing is not planning to make anything useful.

Cheerio,

Posted : 04/08/2023 10:04 am
Chevere, Gummibjorn, Shushuda and 2 people liked
Philipp
(@philipp-8)
Active Member
Topic starter answered:
RE:

Thanks, that was the dumbed down explanation that I needed. 🙂

Posted : 04/08/2023 10:10 am
Rainer
(@rainer-2)
Reputable Member
RE: Difference between profiles

In the print instructions of a part that is highly stressed, it was specified that you should only print in Silent Mode with Bambulab printer, otherwise the strength is too low.

Posted : 07/08/2023 8:59 am
J.Roberts
(@j-roberts)
Active Member
RE: Difference between profiles

You can compare profiles and see the differentials within Prusaslicer : https://help.prusa3d.com/article/compare-presets_301482

In general they reduced ( some settings by quite a bit ) both acceleration and speed.

 

Posted : 09/08/2023 6:24 pm
Renze, Chevere, Theion and 1 people liked
Philipp
(@philipp-8)
Active Member
Topic starter answered:
RE: Difference between profiles

The hint with the comparison is great, thanks!

Posted : 09/08/2023 8:51 pm
SuperSebaS55
(@supersebas55)
Eminent Member
RE: Difference between profiles

Sorry for the question. But can you use the profiles that are not Input Shaper, even if the IS firmware is installed on the printer? Does it make any sense to do this?

Posted : 10/08/2023 3:27 pm
Jakub Dolezal
(@jakub-dolezal)
Member Admin
RE: Difference between profiles

 

Posted by: @philipp-8

Hey everybody, I am wondering what the difference between the "Speed" and "Structural" settings are..

Hi,

it is explained in the latest firmware release:

https://github.com/prusa3d/Prusa-Firmware-Buddy/releases/tag/v5.0.0-RC1

 

Posted by: @supersebas55

Sorry for the question. But can you use the profiles that are not Input Shaper, even if the IS firmware is installed on the printer? Does it make any sense to do this?

Hi,

non IS profiles can be used on an Input Shaper firmware. However, it is better to use the appropriate profiles for the best performance.

Assembly manuals

/ Knowledge Base
The guy behind Prusa assembly manuals...

Posted : 14/08/2023 1:55 pm
Chevere liked
Philipp
(@philipp-8)
Active Member
Topic starter answered:
RE: Difference between profiles

You can install the non-IS profile as a second printer, that's what I am doing. Works great, but is rarely needed.

Posted : 14/08/2023 2:23 pm
neslekkim
(@neslekkim)
Eminent Member
RE: Difference between profiles

 

Posted by: @diem

Functional or structural parts must be printed slowly enough that the layers have time to weld together well.  Even then it pays to consider the direction of print head travel as prints tend to be stronger across the lay and weaker between the layers.

But structural is now slower than the default mk4 profiles, almost like mk3?, atlast for some simple prints I have compared with.

But need to test speed to see if it is strong enough, mostly simple boxes etc (gridfinity)

Posted : 14/08/2023 4:30 pm
Diem
 Diem
(@diem)
Illustrious Member

That's right.  For strong interlayer adhesion slow the printer and raise the temperature - on any FDM printer.  It's a function of the underlying physics, not of the machine.

I can't imagine ever using the speed settings.  On my Mk3 most of my own print profiles reduce the print speed in some way; I label them 'Engineering' profiles rather than structural but the principle is the same.  When my XL arrives I expect to do the same.

If you want to produce qood quality FDM prints quickly buy more printers but slow them down.

Cheerio,

Posted : 15/08/2023 3:44 am
Cipis
(@cipis)
Member
RE: Difference between profiles

 

Posted by: @neslekkim

 

But structural is now slower than the default mk4 profiles, almost like mk3?, atlast for some simple prints I have compared with.

But need to test speed to see if it is strong enough, mostly simple boxes etc (gridfinity)

It is not the case. Both speeds and accelerations are higher with 0.2 STRUCTURAL vs old 0.20 SPEED.

Posted : 15/08/2023 6:45 am
Gummibjorn and OB1 liked
Harabi
(@harabi)
Member
RE: Difference between profiles

I am a bit confused by the patch note description. Is basicly the old SPEED profile obsolete?

If i understand right the the IS STRUCTURAL is faster and deliver better qualiy then the old speed. (Of course with quality filament which can used with the speed and acceleration of the IS profiles) Am I right?

Posted : 19/12/2023 4:32 pm
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